Diamond vs. Quartz — What's the Difference?

Diamond is a form of the element carbon with its atoms arranged in a crystal structure called diamond cubic. At room temperature and pressure, another solid form of carbon known as graphite is the chemically stable form of carbon, but diamond almost never converts to it.

Quartz is a hard, crystalline mineral composed of silica (silicon dioxide). The atoms are linked in a continuous framework of SiO4 silicon-oxygen tetrahedra, with each oxygen being shared between two tetrahedra, giving an overall chemical formula of SiO2.

A precious stone consisting of a clear and colourless crystalline form of pure carbon, the hardest naturally occurring substance

A very hard mineral composed of silica, SiO2, found worldwide in many different types of rocks, including sandstone and granite. Varieties of quartz include agate, chalcedony, chert, flint, opal, and rock crystal.

A figure with four straight sides of equal length forming two opposite acute angles and two opposite obtuse angles; a rhombus

(mineral) The most abundant mineral on the earth's surface, of chemical composition silicon dioxide, SiO₂. It occurs in a variety of forms, both crystalline and amorphous. Found in every environment.

An extremely hard, highly refractive crystalline form of carbon that is usually colorless and is used as a gemstone and in abrasives, cutting tools, and other applications.

Crystal meth: methamphetamine hydrochloride.

A piece of jewelry containing such a gemstone.

A form of silica, or silicon dioxide (SiO2), occurring in hexagonal crystals, which are commonly colorless and transparent, but sometimes also yellow, brown, purple, green, and of other colors; also in cryptocrystalline massive forms varying in color and degree of transparency, being sometimes opaque.

A rhombus, particularly when oriented so that one diagonal extends from left to right and the other diagonal extends from top to bottom.

Colorless glass made of almost pure silica

A red, lozenge-shaped figure on certain playing cards.

A hard glossy mineral consisting of silicon dioxide in crystal form; present in most rocks (especially sandstone and granite); yellow sand is quartz with iron oxide impurities

A playing card with this figure.

Diamonds (used with a sing. or pl. verb) The suit of cards represented by this figure.

The infield.

The whole playing field.

Of or relating to a 60th or 75th anniversary.

To adorn with diamonds.

(uncountable) A glimmering glass-like mineral that is an allotrope of carbon in which each atom is surrounded by four others in the form of a tetrahedron. Category:en:Carbon

A gemstone made from this mineral.

A ring containing a diamond.

A very pale blue color.

Something that resembles a diamond.

(geometry) A rhombus, especially when oriented so that its longer axis is vertical.

(geometry) The polyiamond made up of two triangles.

(baseball) The entire field of play used in the game.

(baseball) The infield of a baseball field.

(card games) A card of the diamonds suit.

A size of type, standardised as 2 point.

The size of type between brilliant and pearl, standardized as 2-point.

Made of, or containing diamond, a diamond or diamonds.

Of, relating to, or being a sixtieth anniversary.

Of, relating to, or being a seventy-fifth anniversary.

(slang) First-rate; excellent.

To adorn with or as if with diamonds

A precious stone or gem excelling in brilliancy and beautiful play of prismatic colors, and remarkable for extreme hardness.

A geometrical figure, consisting of four equal straight lines, and having two of the interior angles acute and two obtuse; a rhombus; a lozenge.

One of a suit of playing cards, stamped with the figure of a diamond.

A pointed projection, like a four-sided pyramid, used for ornament in lines or groups.

The infield; the square space, 90 feet on a side, having the bases at its angles.

The smallest kind of type in English printing, except that called brilliant, which is seldom seen.

Resembling a diamond; made of, or abounding in, diamonds; as, a diamond chain; a diamond field.

A transparent piece of diamond that has been cut and polished and is valued as a precious gem

Very hard native crystalline carbon valued as a gem

A playing card in the minor suit of diamonds

The area of a baseball field that is enclosed by 3 bases and home plate

The baseball playing field